{
  "manageEntity": {
    "action": "Save",
    "entityId": "1476765260",
    "entityType": "Track",
    "nonce": "0xa64a6917c4c808abd6ef5a138a5caba4ba419e7886a70a072b3306c433a21bc4",
    "signature": "0xb7d2813bf6de281c5cd26909ee3c710e9dad565590ad2e1aca1152037f5bb120613bf1403015c5e4ce447df12a70e694aacf13c9b96cc1fce2ecf29e268f79cb1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}